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CA2589321A1 - Single-curvature placido plate with additional surfaces - Google Patents

Single-curvature placido plate with additional surfaces Download PDF

Info

Publication number
CA2589321A1
CA2589321A1 CA002589321A CA2589321A CA2589321A1 CA 2589321 A1 CA2589321 A1 CA 2589321A1 CA 002589321 A CA002589321 A CA 002589321A CA 2589321 A CA2589321 A CA 2589321A CA 2589321 A1 CA2589321 A1 CA 2589321A1
Authority
CA
Canada
Prior art keywords
screen
placido
light
additional surfaces
curvature
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002589321A
Other languages
French (fr)
Other versions
CA2589321C (en
Inventor
Gregg D. Niven
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bausch and Lomb Inc
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US10/320,839 external-priority patent/US6848791B2/en
Application filed by Individual filed Critical Individual
Publication of CA2589321A1 publication Critical patent/CA2589321A1/en
Application granted granted Critical
Publication of CA2589321C publication Critical patent/CA2589321C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

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  • Eye Examination Apparatus (AREA)

Abstract

A placido device (10) includes a single-curvature, semi-circular screen (12) having an opaque covering which is interrupted along its surface to form an illuminated pattern. A flat top (14) is attached to the top of the screen (12) and angled from the screen front (28) towards the screen bottom (26).
Also, a flat bottom (16) is attached to the bottom of the screen (12) and angled from the screen front (28) towards the screen top (24).

Claims (3)

1. A placido apparatus for use in analyzing a patient's eye, comprising:

a placido screen; and a removable light array connected to the placido screen for providing a desired type of light source for illuminating the patient's eye.
2. The placido apparatus of claim 1, wherein the removable light array further includes an annular light array surrounding a central cylindrical through-hole.
3. The placido apparatus of claim 2, wherein the light array is formed of at least one of light emitting diodes (LEDs), infrared light sources, and incandescent light sources.
CA2589321A 2002-12-16 2003-12-09 Single-curvature placido plate with additional surfaces Expired - Fee Related CA2589321C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US10/320,839 2002-12-16
US10/320,839 US6848791B2 (en) 2002-12-16 2002-12-16 Single-curvature placido plate with additional surfaces
CA002508721A CA2508721C (en) 2002-12-16 2003-12-09 Single-curvature placido plate with additional surfaces

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
CA002508721A Division CA2508721C (en) 2002-12-16 2003-12-09 Single-curvature placido plate with additional surfaces

Publications (2)

Publication Number Publication Date
CA2589321A1 true CA2589321A1 (en) 2004-07-22
CA2589321C CA2589321C (en) 2011-07-26

Family

ID=38337980

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2589321A Expired - Fee Related CA2589321C (en) 2002-12-16 2003-12-09 Single-curvature placido plate with additional surfaces

Country Status (1)

Country Link
CA (1) CA2589321C (en)

Also Published As

Publication number Publication date
CA2589321C (en) 2011-07-26

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed

Effective date: 20191209

MKLA Lapsed

Effective date: 20191209